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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Directional symmetry (time series) ： ウィキペディア英語版 Directional symmetry (time series) In statistical analysis of time series and in signal processing, directional symmetry is a statistical measure of a model's performance in predicting the direction of change, positive or negative, of a time series from one time period to the next. ==Definition== Given a time series $t$ with values $t\_i$ at times $i=1,\; \backslash ldots,\; n$ and a model that makes predictions for those values $\backslash hat\; t\_i$, then the directional symmetry (DS) statistic is defined as :$\backslash operatorname(t,\backslash hat\; t)\; =\; \backslash frac\backslash sum\_^d\_i,$ : 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Directional symmetry (time series)」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.